Mexico, or Arizona. It is low here, and damp,--lots of people chase
the cure here, and find it, but it is easier out there where the air is
light and fine and the temperature is even, and where doctors
specialize on lungs."

"Yes, yes, indeed, we shall go right away," declared Carol feverishly.
"Yes, indeed."

"Keep on with my treatment while you are here. And get out as soon as
you can. Stay in bed all the time, and don't bother with many
visitors. I don't need to tell you the minor precautions. You both
have brains. Be sure you use them. Now, don't get blue. You've still
got plenty to laugh at, Mrs. Duke. And I give you fair warning, when
you quit laughing there's the end of the fight. You haven't any other
weapon strong enough to beat the germs."

It was hard indeed for Carol to see anything to laugh at just that
moment, but she smiled, rather wanly, at the doctor when he went away.

There was silence between them for a moment.

At last, she leaned over him and whispered breathlessly, "Maybe it is
really a good thing, David. You did need a vacation, and now you are
bound to get it."

David smiled at her persistent philosophy of optimism.

Again there was silence. Finally, with an effort he spoke. "Carol,
I--I could have thanked God for letting us know this two years ago.
Then you would have escaped."